SIAGIAN, Roy; SITANGGANG, Nathanael; LUBIS, M. Joharis. Project-Based Learning Governance on Natural Materials Improving the Creativity of Class VIII Students of SMP Negeri 1 Sigumpar. Jurnal Pendidikan Matematika dan Sains, [S. l.], v. 11, n. 2, p. 84–90, 2023. DOI: 10.21831/jpms.v11i2.49320. Disponível em: https://jurnal.uny.ac.id/index.php/jpms/article/view/49320. Acesso em: 16 jun. 2025.